Reduction



'(No Model.)

- 3 sheets-sheet 1' J. M. CASE.

REDUCTION MACHINE. 4 No. 276,132. Patented Apr. 17,1883.

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2 t e e h S s t e e h S 3 E S A 0 M e d o M o N REDUCTION MACHINE.

Patented Apr. 17.

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(No Model.) 3 Sheets-Sheet 3-.

J. M. CASE.

.REDUGTION MACHINE. No. 276,132. Patented Apr.17,-1883.

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UNITED STATES PATENT OFFICE.

JOHN M. CASE, OF COLUMBUS, OHIO.

REDUCTION-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 276,132, dated April17, 1883,

(No model.)

To all whom it may concern Be it known that I, JOHN M. CASE, a citizenof the United States, residing at Columbus, in the county of Franklinand State of Ohio, have invented new and useful Improvements inReduction-lilachines, of which the following is a description.

The object of my invention is to provide a more compact machine, bywhich different grades of grain can be quickly reduced, instead ofhaving different machines adapted for various kinds.

In myinvention I use three horizontal rolls, preferably hollow. Themiddle roll is stationary, and the two outer rolls break against it. Themiddle roll is provided with differentlydressed surfaces. Two oppositeportions of its surface are smooth, and are used in grinding very hardwheat. Otheropposite portions of the surface have coarse, bluntcorrugations for ordinary wheat, and other opposite portions of thesurface have fine, sharp corrugations for very dry or wet wheat. Thisconstruction of roll, against which the outside rolls can work, enablesa miller to make the largest possible amount of middlings with thedifferent kinds of wheat in a single machine.

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure l is a perspective view of my improved three-rollreduction-machine. Fig. 2 is a vertical section on the line 2 2, Fig. 3.Fig. 3 is a horizontal section on the line 3 3, Fig. 2.

A represents the framing, and B the inner casing, of the machine. C D Eare three rolls, preferably hollow, having journals 0 0 (Z d e e,mounted in bearing-blocks F F G G H H on the framing. On the extendedjournals 0 c of the outer rolls, .0 E, are keyed pulleys I I, adapted tobe engaged by suitable belting connected with means for rapidlyrevolving these rolls in the direction indicated by the arrows. D is themiddle roll, stationary, though adapted to be adjusted to present itsdifferently-dressed surfaces to the outer rolls. The surface of thisroll (see Fig. 2) consists of smooth portions 01' d, coarse, bluntcorrugations d d, and fine, sharp teethd (1, the corrugations and teethprojecting downwardly on each side of the roll when arranged for work.The outer rolls, C E, are formed with toothed surfaces 0 e for breakingagainst the stationary roll.

J J are the feed-boxes I prefer to use, having slides jj, and mounted onthe top of the casing.

The casing B is provided with three partitions, b b I), located directlyover each roll, and forming chambers b 1), into which the grain is fed,thrown toward the central par tition, and spread on the stationary rollby coming in contact with the tops of the outer rapidly-rotated rolls.The direction of the grain in passing through the chambers is shown byarrows. ,The outer partitions, b, are hinged to permit access to thechambers b b.

I reserve the right to claim in another application the means hereinshown for automatically feeding the grain, and the means for shifting,adjusting, regulating, and cushioning the rolls.

Having thus described my invention, the following is what I claim as newand desire to secure by Letters Patent:

1. In a reduction-machine, the combination of three horizontal rolls,the middle roll being stationaryand the two outside rolls adapted towork against it, as set forth.

2. In a reduction-machine, the combination of three rolls, the middleroll being provided with differently-dressed surfaces, as set forth.

3. In a reduction-maohine, the combination of three rolls, the middlestationary roll being formed with smooth portions on opposite sidesthereof,'as set forth.

4. In a reduction-machine, the combination of three rolls, the middlestationary roll being formed with coarse, blunt corrugations on oppositesides of the roll, as set forth.

5.. In a reduction-machine, the combination of three rolls, the middlestationary roll being formed with fine, sharp corrugations on oppositesides of the roll, as set forth.

6. In a reduction-machine, the combination of three rolls, the middlestationary roll having a series of duplicate difierentlydressed surfaceson opposite sides of the said roll, as set forth.

7. Amiddie roll having series of teeth pointing in opposite directionson opposite sides of the roll, in combination with two outside rollswith teeth in opposite directions to work against the teeth of the saidmiddle roll, as set forth.

JOHN M. CASE. Witnesses:

W. N. TULLER, T. H. McGoY.

